Transfer film is an intermediate carrier, present on top of a transfer paper or plastic base, carrying the printed or printed pattern and used as a chemically elastic film for transferring to the printed article.PET film is a packaging film with comprehensive properties. PET film has excellent mechanical properties, its toughness is the best of all thermoplastics, its tensile strength and impact strength is much higher than the general film; it has good stiffness and is dimensionally stable, suitable for printing, paper bags and other secondary processing. Good chemical resistance and oil resistance. However, it is not resistant to strong alkalis; it is easy to carry static electricity and there is no suitable method to prevent static electricity.